18th November 2008 at 14:35
#54702
pix
Guest
The MS doesn’t know it, but the BSS does. So the BSS will handle an IMSI ATTACH from the MS as a “COMBINED GPRS/IMSI ATTACH” –> The MS will actually communicate with the SGSN, instead of the MSC directly.
I don’t know all the details, if anyone can elaborate …